Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the full behavioral burden. It discloses the paywall (unpaid returns 402), the POST-payment response (same URL returns JSON), and chunk/pagination semantics. It does not describe rate limits or the JSON's shape, but for a paywalled GET the most critical behavioral traits are present.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is compact and front-loaded with the URL and cost. Every sentence adds information about pricing, modes, or payment. The phrasing is slightly cryptic ('Not a new SKU', 'Newest chunk on a plain GET'), but it remains efficient and scannable.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a tool with 4 parameters, no annotations, and no output schema, the description covers the two access modes, the pricing for each, the payment failure/success behavior, and the meaning of ?id, ?before, and pagination. A small gap is the lack of any description of the returned JSON structure, but the operational essentials are all present.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the baseline is 3, and the schema already explains each parameter well. The description reinforces the cost and pagination behavior but adds little beyond the schema for parameter meaning. It earns no penalty but also doesn't elevate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description identifies the tool as a GET endpoint for FinCEN institution consent-order text, explicitly calling out the resource and the three usage modes: plain GET for newest chunk, ?id= for one official text, and ?before= for older chunks. It distinguishes itself from a new SKU, making clear it is the same paid door with different parameters.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

Clear usage context: plain GET returns newest chunk, ?before= returns older chunk, and ?id= fetches the official text. Payment and 402 behavior are explained, and the x_payment parameter is tied to the flow. However, it does not explicitly mention sibling tools or say when to prefer this over alternatives, so it falls just short of a 5.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.